git.sesse.net Git - movit/blob - test_util.cpp

   1 #include <assert.h>
   2 #include <gtest/gtest-message.h>
   3 #include <math.h>
   4 #include <stdio.h>
   5 #include <algorithm>
   6
   7 #include "flat_input.h"
   8 #include "gtest/gtest.h"
   9 #include "init.h"
  10 #include "resource_pool.h"
  11 #include "test_util.h"
  12 #include "util.h"
  13
  14 class Input;
  15
  16 namespace {
  17
  18 // Not thread-safe, but this isn't a big problem for testing.
  19 ResourcePool *get_static_pool()
  20 {
  21         static ResourcePool *resource_pool = NULL;
  22         if (!resource_pool) {
  23                 resource_pool = new ResourcePool();
  24         }
  25         return resource_pool;
  26 }
  27
  28 // Flip upside-down to compensate for different origin.
  29 template<class T>
  30 void vertical_flip(T *data, unsigned width, unsigned height)
  31 {
  32         for (unsigned y = 0; y < height / 2; ++y) {
  33                 unsigned flip_y = height - y - 1;
  34                 for (unsigned x = 0; x < width; ++x) {
  35                         std::swap(data[y * width + x], data[flip_y * width + x]);
  36                 }
  37         }
  38 }
  39
  40 }  // namespace
  41
  42 EffectChainTester::EffectChainTester(const float *data, unsigned width, unsigned height,
  43                                      MovitPixelFormat pixel_format, Colorspace color_space, GammaCurve gamma_curve,
  44                                      GLenum framebuffer_format)
  45         : chain(width, height, get_static_pool()), width(width), height(height), finalized(false)
  46 {
  47         init_movit(".", MOVIT_DEBUG_OFF);
  48
  49         if (data != NULL) {
  50                 add_input(data, pixel_format, color_space, gamma_curve);
  51         }
  52
  53         glGenTextures(1, &texnum);
  54         check_error();
  55         glBindTexture(GL_TEXTURE_2D, texnum);
  56         check_error();
  57         glTexImage2D(GL_TEXTURE_2D, 0, framebuffer_format, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
  58         check_error();
  59
  60         glGenFramebuffers(1, &fbo);
  61         check_error();
  62         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
  63         check_error();
  64         glFramebufferTexture2D(
  65                 GL_FRAMEBUFFER,
  66                 GL_COLOR_ATTACHMENT0,
  67                 GL_TEXTURE_2D,
  68                 texnum,
  69                 0);
  70         check_error();
  71         glBindFramebuffer(GL_FRAMEBUFFER, 0);
  72         check_error();
  73 }
  74
  75 EffectChainTester::~EffectChainTester()
  76 {
  77         glDeleteFramebuffers(1, &fbo);
  78         check_error();
  79         glDeleteTextures(1, &texnum);
  80         check_error();
  81 }
  82
  83 Input *EffectChainTester::add_input(const float *data, MovitPixelFormat pixel_format, Colorspace color_space, GammaCurve gamma_curve)
  84 {
  85         ImageFormat format;
  86         format.color_space = color_space;
  87         format.gamma_curve = gamma_curve;
  88
  89         FlatInput *input = new FlatInput(format, pixel_format, GL_FLOAT, width, height);
  90         input->set_pixel_data(data);
  91         chain.add_input(input);
  92         return input;
  93 }
  94
  95 Input *EffectChainTester::add_input(const unsigned char *data, MovitPixelFormat pixel_format, Colorspace color_space, GammaCurve gamma_curve)
  96 {
  97         ImageFormat format;
  98         format.color_space = color_space;
  99         format.gamma_curve = gamma_curve;
 100
 101         FlatInput *input = new FlatInput(format, pixel_format, GL_UNSIGNED_BYTE, width, height);
 102         input->set_pixel_data(data);
 103         chain.add_input(input);
 104         return input;
 105 }
 106
 107 void EffectChainTester::run(float *out_data, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 108 {
 109         if (!finalized) {
 110                 finalize_chain(color_space, gamma_curve, alpha_format);
 111         }
 112
 113         chain.render_to_fbo(fbo, width, height);
 114
 115         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 116         glReadPixels(0, 0, width, height, format, GL_FLOAT, out_data);
 117
 118         if (format == GL_RGBA) {
 119                 width *= 4;
 120         }
 121
 122         vertical_flip(out_data, width, height);
 123 }
 124
 125 void EffectChainTester::run(unsigned char *out_data, GLenum format, Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 126 {
 127         if (!finalized) {
 128                 finalize_chain(color_space, gamma_curve, alpha_format);
 129         }
 130
 131         chain.render_to_fbo(fbo, width, height);
 132
 133         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 134         glReadPixels(0, 0, width, height, format, GL_UNSIGNED_BYTE, out_data);
 135
 136         if (format == GL_RGBA) {
 137                 width *= 4;
 138         }
 139
 140         vertical_flip(out_data, width, height);
 141 }
 142
 143 void EffectChainTester::finalize_chain(Colorspace color_space, GammaCurve gamma_curve, OutputAlphaFormat alpha_format)
 144 {
 145         assert(!finalized);
 146         ImageFormat image_format;
 147         image_format.color_space = color_space;
 148         image_format.gamma_curve = gamma_curve;
 149         chain.add_output(image_format, alpha_format);
 150         chain.finalize();
 151         finalized = true;
 152 }
 153
 154 void expect_equal(const float *ref, const float *result, unsigned width, unsigned height, float largest_difference_limit, float rms_limit)
 155 {
 156         float largest_difference = -1.0f;
 157         float squared_difference = 0.0f;
 158         int largest_diff_x = -1, largest_diff_y = -1;
 159
 160         for (unsigned y = 0; y < height; ++y) {
 161                 for (unsigned x = 0; x < width; ++x) {
 162                         float diff = ref[y * width + x] - result[y * width + x];
 163                         if (fabs(diff) > largest_difference) {
 164                                 largest_difference = fabs(diff);
 165                                 largest_diff_x = x;
 166                                 largest_diff_y = y;
 167                         }
 168                         squared_difference += diff * diff;
 169                 }
 170         }
 171
 172         EXPECT_LT(largest_difference, largest_difference_limit)
 173                 << "Largest difference is in x=" << largest_diff_x << ", y=" << largest_diff_y << ":\n"
 174                 << "Reference: " << ref[largest_diff_y * width + largest_diff_x] << "\n"
 175                 << "Result:    " << result[largest_diff_y * width + largest_diff_x];
 176
 177         float rms = sqrt(squared_difference) / (width * height);
 178         EXPECT_LT(rms, rms_limit);
 179
 180         if (largest_difference >= largest_difference_limit || rms >= rms_limit) {
 181                 fprintf(stderr, "Dumping matrices for easier debugging, since at least one test failed.\n");
 182
 183                 fprintf(stderr, "Reference:\n");
 184                 for (unsigned y = 0; y < height; ++y) {
 185                         for (unsigned x = 0; x < width; ++x) {
 186                                 fprintf(stderr, "%7.4f ", ref[y * width + x]);
 187                         }
 188                         fprintf(stderr, "\n");
 189                 }
 190
 191                 fprintf(stderr, "\nResult:\n");
 192                 for (unsigned y = 0; y < height; ++y) {
 193                         for (unsigned x = 0; x < width; ++x) {
 194                                 fprintf(stderr, "%7.4f ", result[y * width + x]);
 195                         }
 196                         fprintf(stderr, "\n");
 197                 }
 198         }
 199 }
 200
 201 void expect_equal(const unsigned char *ref, const unsigned char *result, unsigned width, unsigned height, unsigned largest_difference_limit, float rms_limit)
 202 {
 203         assert(width > 0);
 204         assert(height > 0);
 205
 206         float *ref_float = new float[width * height];
 207         float *result_float = new float[width * height];
 208
 209         for (unsigned y = 0; y < height; ++y) {
 210                 for (unsigned x = 0; x < width; ++x) {
 211                         ref_float[y * width + x] = ref[y * width + x];
 212                         result_float[y * width + x] = result[y * width + x];
 213                 }
 214         }
 215
 216         expect_equal(ref_float, result_float, width, height, largest_difference_limit, rms_limit);
 217
 218         delete[] ref_float;
 219         delete[] result_float;
 220 }
 221
 222 void test_accuracy(const float *expected, const float *result, unsigned num_values, double absolute_error_limit, double relative_error_limit, double local_relative_error_limit, double rms_limit)
 223 {
 224         double squared_difference = 0.0;
 225         for (unsigned i = 0; i < num_values; ++i) {
 226                 double absolute_error = fabs(expected[i] - result[i]);
 227                 squared_difference += absolute_error * absolute_error;
 228                 EXPECT_LT(absolute_error, absolute_error_limit);
 229
 230                 if (expected[i] > 0.0) {
 231                         double relative_error = fabs(absolute_error / expected[i]);
 232
 233                         EXPECT_LT(relative_error, relative_error_limit);
 234                 }
 235                 if (i < num_values - 1) {
 236                         double delta = expected[i + 1] - expected[i];
 237                         double local_relative_error = fabs(absolute_error / delta);
 238                         EXPECT_LT(local_relative_error, local_relative_error_limit);
 239                 }
 240         }
 241         double rms = sqrt(squared_difference) / num_values;
 242         EXPECT_LT(rms, rms_limit);
 243 }